<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片区域 -->
        <el-card>
            <!-- 添加角色区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
             </el-row>
             <!-- 角色列表区域 -->
             <el-table :data="rolelist" border stripe>           
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row  :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable  @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <!-- 通过 for 循环 嵌套渲染二级权限 -->
                            <el-row :class="[i2 === 0 ?'bdtop' :''  , 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                            <el-col :span="6">
                                <el-tag type="success" closable  @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="18">
                                <el-tag type="warning" closable @close="removeRightById(scope.row, item3.id)" v-for="(item3) in item2.children" :key="item3.id">{{item3.authName}}</el-tag>
                            </el-col>
                            </el-row>
                        </el-col>
                        </el-row>

                        <!-- <pre>
                        {{scope.row}}
                        </pre> -->
                    </template>
                </el-table-column> 
                <el-table-column type="index"></el-table-column>             
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
               </el-table-column>
           </el-table>
        </el-card>
         <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"  ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>

export default {
    data(){
        return{
            rolelist:[],
            setRightDialogVisible:false,
            rightslist:[],
            roleId:'',
            treeProps: {
                label: 'authName',
                children: 'children'
             },
             defKeys:[]
        }
        
    },
  created() {
       this.getRolesList()
  },
 
  methods:{
     async getRolesList(){
       const {data:res} = await this.$http.get("roles")
      
       if(res.meta.status!==200)return this.$message.error(res.meta.msg);
       this.rolelist=res.data
        
      },
     async removeRightById(role, rightId){
         const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      //确定按钮输出confirm
      //取消按钮输出cancel
      if(confirmResult!=="confirm") return this.$message.info("取消删除")
        const {data:res}= await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        console.log(res)
        if(res.meta.status!==200)return this.$message.error(res.meta.msg)
        role.children=res.data
        
        },
    async showSetRightDialog(role){
         this.roleId = role.id
        this.setRightDialogVisible=true
        const { data: res } = await this.$http.get('rights/tree')
        if(res.meta.status!==200)return this.$message.error(res.meta.msg)
        this.rightslist=res.data
        console.log(this.rightslist)
         this.getLeafKeys(role, this.defKeys)
    },
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
   
    setRightDialogClosed() {
      this.defKeys = []
    },
    async allotRights(){
       const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  }
}
</script>
<style lang="less" scoped>
    .el-card {
        margin-top: 15px;
    }
    .bdtop {
    border-top: 1px solid #eee;
    }
    .vcenter {
    display: flex;
    align-items: center;
    }
    .el-tag {
        margin: 15px;
    }
</style>


